People.com Celebrity Star Tracks: Monday, December 20, 2010 The couple step out to shop in chilly New York City. Plus: Megan Fox, Kate & William, the Beckhams and more By People Staff Published on December 20, 2010 05:00 PM Share Tweet Pin Email 01 of 17 DAY TRIPPERS Jackson Lee/Splash News Online Ashley Greene and Joe Jonas continue their tour of the Big Apple Sunday, stepping out for some shopping in the city. 02 of 17 BEACHY KEEN Bauer-Griffin Megan Fox shows off her bikini body in an itty-bitty two-piece Saturday in Hawaii, where the star is vacationing with husband Brian Austin Green (not pictured). 03 of 17 SINGLES SCENE Denise Truscello/WireImage Despite splitting with longtime love Zac Efron, Vanessa Hudgens has plenty to smile about Saturday at Pure Nightclub in Las Vegas – she was celebrating her 22nd birthday surrounded by pals Ashley Tisdale and Brittany Snow. 04 of 17 ROYAL WELCOME Mark Cuthbert/PA/ABACA Kate Middleton and Prince William make their first public appearance as an engaged couple Saturday, attending the charity fund-raiser Thursford Christmas Spectacular in Norfolk, England. 05 of 17 GOOD SPORTS Tony Woolliscroft/Getty Is there an award for best-looking family? Victoria Beckham and sons Brooklyn, 11, Romeo, 8, and Cruz, 5, proudly flank David Beckham at the BBC Sports Personality of the Year event at the LG Arena in Birmingham, England, where he was honored for his excellence in Soccer on Monday. 06 of 17 GREENER PASTURES INF Cameron Diaz lives the good life Sunday, frolicking in Cabo San Lucas, Mexico, with beau Alex Rodriguez, a week after the duo got cozy in Miami. 07 of 17 NE-YO, NEW YORK! Steve Mack/Getty RampB singer Ne-Yo starts spreading the news – and plenty of holiday cheer! – while handing out gifts at the Compound Foundation's 2010 Giving Tour at the Boys amp Girls Club in N.Y.C. on Sunday. "This is a toy drive y'all, not a show, but I WILL be there!" the gracious star Tweeted. 08 of 17 START YOUR ENGINES Robert Smith/IPA/iPhoto Fragrances, music, sparkling wine…now a motorcycle racing team! Biker chick Paris Hilton revs up the world of professional motorcycle racing by presenting her own team, SuperMartxe VIP by Paris Hilton, in Madrid on Sunday. 09 of 17 Miami Nice Mavrix Justin Bieber and Selena Gomez stroll through breezy South Beach before his concert Saturday. 10 of 17 Snack Time Paul Kolnik Suri Cruise eats her treats with mom Katie Holmes and dad Tom Cruise backstage at The Nutcracker in New York on Friday 11 of 17 LADY GRR GRR X17 After a red hot performance at London's O2 arena, Lady Gaga heads out for a night on the town on Friday, flaunting another fabulous outfit and a ferocious expression. 12 of 17 NOSH NUZZLE Flynet Leaving baby Olivia at home, James Van Der Beek and wife Kimberly duck out of diaper duty for a date night in L.A. on Thursday. 13 of 17 GUITAR HERO Robert Wallace/WENN Rock on, mate! Jon Bon Jovi revs up the crowd Friday during a performance Down Under for the band's "The Circle Tour" in Sydney, Australia. 14 of 17 FANCY FOOTWORK Albert Michael/Startraks All that glitters is Kristin Chenoweth's feet, as the actress tackles some holiday shoe-shopping Thursday on New York's famed Fifth Avenue. 15 of 17 ON HOME TURF Beretta/Sims/Startraks As wife Gwyneth Paltrow sexily travels the globe, Coldplay's Chris Martin holds down the homefront in London, where he's spotted outside BBC's Radio 1 studios on Friday. 16 of 17 ICE QUEEN Albert Michael/Startraks Ice, ice, baby! NBC reporter Maria Menounos channels her inner figure skater Friday at New York's Rockefeller Center skating rink. 17 of 17 SAFETY BLANKET NBC/AP Braving the cold in a sharp charcoal suit with wine-colored lapels, Kevin Spacey clutches a cozy blanket for a Friday appearance on the Today show.